How to Import Posts from Tumblr to WordPress
Step 1) Log into the Dashboard
Step 2) Click on the Tools link in the left panel
Step 3) Click on the Import link in the left panel
Step 4) Click on Tumblr
Step 5) Click Install Now to install the Tumblr Importer
Step 6) Click “Activate & Run Importer”
Step 7) Click the link to http://www.tumblr.com/oauth/apps
Step 8) Click the green Register Application button
Step 9) Fill in the Name, Website, and Default Callback URL as instructed by WordPress earlier.
Step 10) Click Show Secret Key
Step 11) Paste your OAuth Consumer Key and Secret Key into the WordPress fields, then click Connect to Tumblr
Step 12) Authorize the Tumblr App by clicking the link
Step 13) Allow WordPress to have access to the Tumblr App
Step 14) Click Import for whichever Tumblr Blog on your account you wish to import.
Step 15) Sit back and enjoy while WordPress imports your Tumblr Posts